CN203501972U - Bituminous pavement horizontal-H type multi-row strain sensor - Google Patents
Bituminous pavement horizontal-H type multi-row strain sensor Download PDFInfo
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- CN203501972U CN203501972U CN201320663576.7U CN201320663576U CN203501972U CN 203501972 U CN203501972 U CN 203501972U CN 201320663576 U CN201320663576 U CN 201320663576U CN 203501972 U CN203501972 U CN 203501972U
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- bituminous pavement
- strain
- strain transducer
- fiber
- strain sensor
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Abstract
The utility model relates to a bituminous pavement horizontal-H type multi-row strain sensor comprising more than two nylon rods and two aluminium rods; the multi-row strain sensor is specialized in that two ends of the nylon rod are respectively fixed on the two aluminium rods; the nylon rods are provided with strain sensors connected with signal lines; the aluminium rods are provided with grooves matched with the signal lines. The strain sheet of the strain sensor is a 350 ohm Wheatstone bridge circuit. The bituminous pavement strain sensor can measure vertical tension strain on various spots of the bituminous pavement; through comparing data obtained by different sensors, the maximum tension strain position of the bituminous pavement can be determined, and data acquisition is convenient. The signal lines are arranged in the grooves of the aluminium rods, thereby effectively protecting the signal lines. The surface of the strain sensor is coated with a protection film, thereby generating heat isolation and moisture proof effects for the strain sensor, and preventing foreign matter invasion in an installation and usage process.
Description
Technical field
The utility model relates to a kind of many rows of bituminous pavement work type formula strain transducer, in particular, relates in particular to a kind of many rows of the work type formula strain transducer that can measure longitudinal stretching strain of bituminous pavement many places simultaneously and determine locations of maximum strain.
Background technology
For the coping behavior of bituminous pavement under research weather and Vehicle Load, and road pavement analytical model and fatigue equation verify, often needs to observe the strain-responsive of brea bed under dynamic loads effect.Resistance strain sensor has can survey strain good linearity, and resolution is high, can meet strain (stress) centralized detecting.Resistance strain gage has wide range of applications, can under various special environment conditions, work, as at 1 000 ℃ of high temperature, low temperature-269 ℃, high pressure, under water, high-intensity magnetic field and nuclear radiation etc. very all can carry out stress (strain) test under rugged environment condition.
But conventional resistance strain often can only be measured single strain-responsive, can not accurately determine that locations of maximum strain or definite method are more loaded down with trivial details.In addition, be embedded in the influence factor that the strain transducer in pavement structure is subject to more, in the situation that long-time and vehicle roll, the signal wire of strain transducer is easily destroyed, strainometer bury underground with acquisition process process in need to follow certain method.
Summary of the invention
The utility model, in order to overcome the shortcoming of above-mentioned technical matters, provides a kind of many rows of bituminous pavement work type formula strain transducer.
Many rows of bituminous pavement work type formula strain transducer of the present utility model, comprises plural fiber-glass pole and two aluminium bars; Its special feature is: the two ends of fiber-glass pole are individually fixed on two aluminium bars, are provided with strain transducer on fiber-glass pole, and strain transducer is connected with signal wire; On aluminium bar, offer the groove matching with signal wire.
Strain transducer is all set on a plurality of fiber-glass poles, can measures longitudinal stretching strain that bituminous pavement has more simultaneously, the data that simultaneously each sensor recorded contrast, and can determine the position of the maximum stretching strain of bituminous pavement, and data acquisition is convenient.By signal wire being placed among the groove on aluminium bar, effectively realized the protective effect to signal wire.
Many rows of bituminous pavement work type formula strain transducer of the present utility model, the foil gauge of described strain transducer is the Wheatstone bridge of 350 ohm.Wheatstone bridge has lot of advantages, as suppressed the impact of temperature variation, suppresses to disturb, and compensation is convenient etc.
Many rows of bituminous pavement work type formula strain transducer of the present utility model, is provided with the band that signal wire is fixed on described fiber-glass pole and aluminium bar.
Many rows of bituminous pavement work type formula strain transducer of the present utility model, described fiber-glass pole is connected with aluminium bar by screw thread, offers the threaded hole matching with fiber-glass pole on aluminium bar, is provided with hold-down nut on fiber-glass pole.
Many rows of bituminous pavement work type formula strain transducer of the present utility model, the surface of described strain transducer is coated with the protective film that one deck is heat insulation, moistureproof.Protective film can adopt to be received speed and carrys out protective film, and it is imported from America material, and principal ingredient is acid propyl base fluid and nanometer b-oxide, by protective film is set, can make key position avoid invasion overheated, that cross tide and installation process and use procedure foreign matter.
The beneficial effects of the utility model are: bituminous pavement strain transducer of the present utility model, by a plurality of fiber-glass poles being set between two aluminium bars, and strain transducer is set on fiber-glass pole, can measure longitudinal stretching strain of bituminous pavement many places simultaneously, by the comparison to different sensors data measured, can determine the maximum stretching strain position of bituminous pavement, data acquisition is convenient.By signal wire being placed among the groove of aluminium bar, effectively realized the protective effect to signal wire.By the surface at strain transducer, apply protective film, both played heat insulation, the moisture-proof role of strain transducer, can avoid again foreign matter in installation and use procedure to invade.
The utlity model has following advantage:
1) impact of temperature variation is little, anti-interference, and compensation is convenient.
2) many rows of work type formula strain transducer of the present utility model has good adaptability to the particular surroundings of bituminous pavement;
3) by the voltage signal of output, be multiplied by corresponding transformation ratio, can obtain along the axial tension and compression strain of fiber-glass pole, better the strain data in collection vehicle driving process;
4) measure highly sensitively, monitor strain range is large, and precision can reach 1%--2%;
5) in measurement, be output as electric signal, adopt electronic device easily to realize the advantages such as measuring process robotization and remote transmission.
Accompanying drawing explanation
Fig. 1 is the structural representation of many rows of bituminous pavement work type formula strain transducer of the present utility model;
Fig. 2 is the structural representation in A-A cross section in Fig. 1;
Fig. 3 is the structural representation in B-B cross section in Fig. 1.
In figure: 1 fiber-glass pole, 2 aluminium bars, 3 strain transducers, 4 grooves, 5 signal wires, 6 bands, 7 hold-down nuts, 8 threaded holes.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
As shown in Figure 1, provided the structural representation of many rows of bituminous pavement work type formula strain transducer of the present utility model, it comprises a plurality of fiber-glass pole 1, two aluminium bars 2, the strain transducer 3, signal wire 5, band 6 and the hold-down nut 7 that equate with fiber-glass pole 1 number; The quantity of fiber-glass pole 1 is at least 2, is 3 fiber-glass poles 1 in figure, and the two ends of each fiber-glass pole 1 all fix with aluminium bar 2.Strain transducer 3 is arranged on fiber-glass pole 1, for realizing the measurement of the longitudinal stretching strain of bituminous pavement.On each strain transducer 3, be provided with signal wire 5, so that the signal that output records.On aluminium bar 2, offer groove 4, signal wire 5 is placed in groove 4 in the process of laying, and can avoid signal wire 5 to use and vehicle rolls under state and is damaged long-time.Owing to being provided with strain transducer 3 on many fiber-glass poles 1, the longitudinal stretching strain that can simultaneously measure bituminous pavement many places, by the comparison to different sensors data measured, can determine the maximum stretching strain position of bituminous pavement, and data acquisition is convenient.
In order to realize the Measurement accuracy to bituminous pavement deformation quantity, strain transducer 3 adopts the Wheatstone bridge resistance strain plate of 350 ohm, and Wheatstone bridge has lot of advantages, as suppressed the impact of temperature variation, suppresses to disturb, and compensation is convenient etc.By the voltage signal of the utility model output is gathered, and according to effector calibration data, obtain conversion coefficient, i.e. the relation of unit strain and unit voltage, finally obtains strain data.
On fiber-glass pole 1 and aluminium bar 2, be also provided with band 6, utilize band 6 signal wire 5 can be firmly fixed on fiber-glass pole 1 and aluminium bar 2.As shown in Figures 2 and 3, provided respectively the structural representation of A-A and B-B cross section in Fig. 1, on shown aluminium bar 2, be not only provided with groove 4, also be provided with the threaded hole 8 matching with fiber-glass pole 1, to realize being threaded of fiber-glass pole 1 and aluminium bar 2, the end of each pole of fiber-glass pole 1 is provided with hold-down nut 7.
The construction method of many rows of bituminous pavement work type formula strain transducer of the present utility model:
1) after base layer construction, the thickness of basic unit, flatness, packing, road camber etc. are checked, if there is ups and downs, loose, hole groove etc., must rebuild, after trimming, basic unit's cleaning is clean, and the burial place of many rows of work type formula strain transducer is determined in setting-out;
2) strain transducer cisco unity malfunction with multimeter, checks that whether strain transducer 3 is working properly, if need be changed in time;
3) many rows of work type formula strain transducer is fixed on to predetermined burial place, and sprays asphalt of penetrate layer in relevant position;
4) according to definite coefficient of loose laying asphalt that paves;
5) bituminous mixture laying smooth after, should roll while hot, after rolling, then check that with multimeter whether sensor working properly.
3, points for attention
1) while burying strain transducer underground, should note drawing of sensor lead, be convenient to data acquisition;
2), during bituminous mixture laying, note controlling the temperature that paves and can not, lower than regulation and stipulation value, note controlling compactness simultaneously;
3) while rolling, note not adopting vibrating roller, in order to avoid affect strain transducer, normally work.
Claims (5)
1. many rows of bituminous pavement work type formula strain transducer, comprises plural fiber-glass pole (1) and two aluminium bars (2); It is characterized in that: the two ends of fiber-glass pole are individually fixed on two aluminium bars, on fiber-glass pole, be provided with strain transducer (3), strain transducer is connected with signal wire (5); On aluminium bar, offer the groove (4) matching with signal wire.
2. many rows of bituminous pavement work type formula strain transducer according to claim 1, is characterized in that: the foil gauge of described strain transducer (3) is the Wheatstone bridge of 350 ohm.
3. many rows of bituminous pavement work type formula strain transducer according to claim 1 and 2, is characterized in that: on described fiber-glass pole (1) and aluminium bar (2), be provided with the band (6) that signal wire (5) is fixed.
4. many rows of bituminous pavement work type formula strain transducer according to claim 1 and 2, it is characterized in that: described fiber-glass pole (1) is connected with aluminium bar (2) by screw thread, on aluminium bar, offer the threaded hole (8) matching with fiber-glass pole, on fiber-glass pole, be provided with hold-down nut (7).
5. many rows of bituminous pavement work type formula strain transducer according to claim 1 and 2, is characterized in that: the surface of described strain transducer (3) is coated with the protective film that one deck is heat insulation, moistureproof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320663576.7U CN203501972U (en) | 2013-10-25 | 2013-10-25 | Bituminous pavement horizontal-H type multi-row strain sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320663576.7U CN203501972U (en) | 2013-10-25 | 2013-10-25 | Bituminous pavement horizontal-H type multi-row strain sensor |
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| Publication Number | Publication Date |
|---|---|
| CN203501972U true CN203501972U (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320663576.7U Expired - Fee Related CN203501972U (en) | 2013-10-25 | 2013-10-25 | Bituminous pavement horizontal-H type multi-row strain sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486218A (en) * | 2016-01-12 | 2016-04-13 | 山东大学 | Smart material strain gauge for monitoring strain of asphalt pavement and application |
| CN108732054A (en) * | 2018-04-03 | 2018-11-02 | 河北大学 | Small-sized pin disk contacts reciprocating friction abrasion test device |
-
2013
- 2013-10-25 CN CN201320663576.7U patent/CN203501972U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486218A (en) * | 2016-01-12 | 2016-04-13 | 山东大学 | Smart material strain gauge for monitoring strain of asphalt pavement and application |
| CN105486218B (en) * | 2016-01-12 | 2019-07-02 | 山东大学 | It is a kind of to monitor the smart material strain gauge and application that bituminous pavement strains |
| CN108732054A (en) * | 2018-04-03 | 2018-11-02 | 河北大学 | Small-sized pin disk contacts reciprocating friction abrasion test device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20141025 |
|
| EXPY | Termination of patent right or utility model |